Yamaha MBK X-MAX 300 2017 Service Manual page 353

Fault code No.
Item
3 Wire harness continuity.
3-1
1. Throttle body sensor assembly
2. Throttle position sensor
3. ECU
4. Sensor input lead
5. Sensor output lead
6. Sensor ground lead
3-2 Disconnect the ECU coupler from the ECU.
Disconnect the throttle body sensor assembly coupler from the throttle body.
3-3 [For P0122] Ground short circuit
Between throttle body sensor assembly coupler and ground: yellow–ground
If there is continuity, replace the wire harness.
P0122, P0123
No normal signals are received from the throttle position sensor.
[P0122] Throttle position sensor: open or ground short circuit de-
tected.
[P0123] Throttle position sensor: open or power short circuit detect-
ed.
Open or short circuit → Replace
the wire harness.
1
L
2
Y
P/W
Br/W
B/L
B/L Y L P/W Br/W
8-48
FUEL INJECTION SYSTEM
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
Condition is "Recover" → Go to
item 7 and finish the service.
Condition is "Malfunction" → Go
to item 4.
3
5V
4
L
Y
5
P/W
5V
Br/W
B/L
6